Laser Display System with Optical Feedback Configured to Reduce Speckle Artifacts
    11.
    发明申请
    Laser Display System with Optical Feedback Configured to Reduce Speckle Artifacts 有权
    配有光学反馈的激光显示系统,以减少斑点伪像

    公开(公告)号:US20100080253A1

    公开(公告)日:2010-04-01

    申请号:US12241597

    申请日:2008-09-30

    申请人: Taha Masood

    发明人: Taha Masood

    IPC分类号: H01S3/10 G03B21/00

    摘要: An imaging system (200) includes a plurality of laser sources (201) configured to produce a plurality of light beams (204). One or more optical alignment devices (220) orient the light beams (204) into a collimated light beam (205). A light modulator (203) modulates the collimated light beam (205) such that images (206) can be presented on a display surface (207). Speckle is reduced with an optical feedback device (221) that causes the laser sources (201) to operate in a coherence collapsed state. Examples of optical feedback devices (221) include partially reflective mirrors and beam splitter-mirror combinations.

    摘要翻译: 成像系统(200)包括被配置为产生多个光束(204)的多个激光源(201)。 一个或多个光学对准装置(220)将光束(204)定向成准直光束(205)。 光调制器(203)调制准直光束(205),使得图像(206)可以呈现在显示表面(207)上。 使用导致激光源(201)在相干折叠状态下操作的光学反馈装置(221)来减少斑点。 光学反馈装置(221)的示例包括部分反射镜和分束镜组合。

    Single-wavelength, unequal-length-multi-cavity grating-outcoupled surface emitting laser with staggered tuned distributed Bragg reflectors
    13.
    发明授权
    Single-wavelength, unequal-length-multi-cavity grating-outcoupled surface emitting laser with staggered tuned distributed Bragg reflectors 有权
    具有交错调谐分布布拉格反射器的单波长,不等长多孔光栅耦合表面发射激光器

    公开(公告)号:US06888874B2

    公开(公告)日:2005-05-03

    申请号:US10348920

    申请日:2003-01-22

    摘要: A laser diode system is provided. The laser comprises first and second reflective gratings at each end of the laser. The laser further comprises an outcoupling grating between the first and second reflective gratings, wherein the outcoupling grating couples light out of the laser. The reflectors and outcoupling grating each have a unique wide-band reflective spectrum. A first laser cavity exists between the first and second reflective gratings. A second laser cavity exists between the first reflective grating and the outcoupling grating. A third laser cavity exists between the second reflective grating and the outcoupling grating, and a fourth laser cavity exists with in the outcoupling region. The overlap of reflective spectra determine the lasing wavelengths that reach resonance within each cavity. Wavelengths resonant in one cavity are suppressed in the others unless a wavelength is resonant in all cavities. This matching of mode intensities causes the outcoupled beam to be confined to a single wavelength.

    摘要翻译: 提供了一种激光二极管系统。 激光器包括在激光器的每一端的第一和第二反射光栅。 激光器还包括在第一和第二反射光栅之间的输出耦合光栅,其中输出耦合光栅将光从激光器耦合。 反射器和外耦合光栅每个都具有独特的宽带反射光谱。 在第一和第二反射光栅之间存在第一激光腔。 在第一反射光栅和外耦合光栅之间存在第二激光腔。 在第二反射光栅和外耦合光栅之间存在第三激光腔,并且在外耦合区域中存在第四激光腔。 反射光谱的重叠决定了在每个腔内达到谐振的激光波长。 在一个空腔中谐振的波长在其他腔中被抑制,除非波长在所有空腔中共振。 模式强度的这种匹配使得输出耦合的光束被限制在单个波长。

    Single mode grating-outcoupled surface emitting laser with broadband and narrow-band DBR reflectors
    14.
    发明授权
    Single mode grating-outcoupled surface emitting laser with broadband and narrow-band DBR reflectors 有权
    单模光栅耦合表面发射激光器,具有宽带和窄带DBR反射器

    公开(公告)号:US06810067B2

    公开(公告)日:2004-10-26

    申请号:US10255443

    申请日:2002-09-26

    IPC分类号: H01S308

    摘要: A laser source is provided by the present invention, comprising a laser diode and has an active region with asymmetric distributed Bragg reflectors (DBRs) at either end to reflect light within the cavity, and an outcoupling grating in the center of the device, which couples light out of the cavity. One DBR is long and shallow, with a narrow-band reflective spectrum. The other DBR is short and deep, with a wide-band reflective spectrum. The lasing wavelength is determined by the reflective spectrum overlap of the two DBRs. Since the shallow DBR is highly reflective to only one Fabry Perot wavelength, and the deep DBR is highly reflective to a wide band of Fabry-Perot wavelengths, it is the reflective spectrum of the shallow DBR that determines the lasing wavelength.

    摘要翻译: 本发明提供了一种激光源,它包括一个激光二极管,并具有一个有效区域,在两端都有非对称分布式布拉格反射器(DBR),以反射空腔内的光线,以及耦合在器件中心的输出耦合光栅 光线从腔中射出。 一个DBR长而浅,具有窄带反射光谱。 另一个DBR短而深,具有宽带反射光谱。 激光波长由两个DBR的反射光谱重叠决定。 由于浅的DBR对于仅仅一个法布里珀罗波长是高反射性的,深DBR对于法布里 - 珀罗波长的宽带是高度反射的,所以它是确定激光波长的浅DBR的反射光谱。